Basically what do you think could become the 3rd coin in the future? Right now LTC is selling like crazy! (Too bad I'm in the confirmation phase in both Mt.Gox and Bitstamp, I'm gonna lose the party ToT.

Well, I don't know much about cryptocurrencies right now but I think the 3rd coin either isn't in the market right now or is not one of the coins that are doing well, no, in my opinion the 3rd coin is gonna be a coin that either is undervalued right now (People are gonna see it and think "Ey, looks cheap gotta buy some") or maybe a coin that has a lot of marketing behind it (Perhaps a coin made by a bank or something like that?)

Peercoin will replace LTC as silver. Primecoin will fill the bronze role. LTC will crash into uselessness.

I have to concur with this. What exactly does Litecoin offer at the moment? Primecoin's proof-of-work system is more resistant to ASIC-centralization than scrypt and is actually of scientific use. Peercoin has an entirely different philosophy. Litecoin is a slightly faster version of Bitcoin, but is that enough?